I looked at the forums you linked and at least I'm not the only one. I wish I could connect it to something but I'm not running anything different and the freezes/lock ups/crashes seem to occur randomly. I havn't installed new software and since I noticed it happening I've even taken to killing programs running in the background via the task manager as administrator before I launch Firefox and see no difference in the frequency of events.

I looked around and the best solution people have come up with is to roll back to the previous stable version before 3.6.6.